Networker

[Networker] Slow restores with Domino transaction logging

2007-06-20 14:28:25
Subject: [Networker] Slow restores with Domino transaction logging
From: Jeff Mery <jeff.mery AT NI DOT COM>
To: NETWORKER AT LISTSERV.TEMPLE DOT EDU
Date: Wed, 20 Jun 2007 10:39:09 -0500
Networker 7.1.4 on Solaris 9
Networker 7.3.2 client on Windows 2003
Networker 3.0 Module for Domino on Windows 2003
Lotus Domino 6.5

We're testing transaciton logging in our Domino environment.  This is 
primarily so we can move to incremental backups rather than do fulls every 
night (nearly 1TB nightly for fulls).  The incremental backups are working 
with no issues and the incrementals are currently about 10% - 20% of the 
size of the fulls.  Test restores from fulls and incrementals with this 
setup are also successful so we know Networker is doing its job.

Our problem is with the amount of time restores take when recovering from 
an incremental backup.  Yesterday, an incremental took 3 minutes to pull 
the full data and 12.5 *hours* to apply the transaction logs.  The 
transaction logs weren't even from tape (apparently the Domino module is 
smart enough to use logs on the disks of the Domino server if they're 
still there).  Yes, we are aware of the restore differences with 
incrementals, but 12.5 hours is pretty obscene for a small file.

So, to any of the Domino folks out there - What are your incremental 
restores like?  What have you done to tune Domino transaction logging for 
Networker backups?  Our test box is not that busy but is generating 
several 64MB log files per minute.  (We are using archive logging, not 
circular logging)

I honestly don't believe Networker to be the problem.  However, since 
we'll get the brunt of the questions on this, I figured I'd ask here 
before we  go the EMC support route adn our messaging guys go to Lotus.

TIA,
Jeff Mery - MCSE, MCP
National Instruments

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